Hi, Chez! I can't to understand at moment what do you mean speaking about steeper motor? What is it? If you mean just the actuator of idle speed, I can to inform you regarding the level of Moscow's price only!.
I'm afraid they are not very interesting for you, but... cost of actuator - near 150 euro, cost of job(replacing, diagnostic over ecu and andjustment of new one) - 25 euro.
Boys from service station told me that all times new actuator needs some tuning by ecu after installation, because its "very complicate electronic unit", but I have some doubts concerning this matter,,,
I disassembled old actuator and all I have found inside are the stepper motor for the control of air throttle and primitive rheostatic encoder which indicates the throttle position for ecu! My basic trade is the control systems for industrial purposes(such CNC, electrical drives and others) and I guess I have some knowlege in this field but I really can't understand what kind of tuning this f**ng actuator needs! Its something over my mind!
As I think you have to spend only twenty minutes for the replacing of this piece.
But may be I,m wrong...
Its very cold in moscow now and I'm forced to wait a spring for continuation of the repairing of my car..
Good luck for all,